1000255515 has 16 divisors (see below), whose sum is σ = 1829038848. Its totient is φ = 457259616.

The previous prime is 1000255511. The next prime is 1000255523. The reversal of 1000255515 is 5155520001.

It is not a de Polignac number, because 1000255515 - 2² = 1000255511 is a prime.

It is a super-2 number, since 2×1000255515² = 2001022190575830450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1000255511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4763017 + ... + 4763226.

It is an arithmetic number, because the mean of its divisors is an integer number (114314928).

Almost surely, 2^1000255515 is an apocalyptic number.

1000255515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000255515 is a deficient number, since it is larger than the sum of its proper divisors (828783333).

1000255515 is an equidigital number, since it uses as much as digits as its factorization.

1000255515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526258.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1000255515 is about 31626.8163905253. The cubic root of 1000255515 is about 1000.0851644135.

Adding to 1000255515 its reverse (5155520001), we get a palindrome (6155775516).

The spelling of 1000255515 in words is "one billion, two hundred fifty-five thousand, five hundred fifteen".